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The iPhone Stereo Headset was introduced in 2007 and was bundled with the original iPhone and iPhone 3G, and featured a control capsule in-line with the left earbud's wire with a microphone and a single button, actuated by squeezing the unit, which can be programmed to control calls, presentations, music and video playback, launch Siri, or take pictures with the Camera application.
The official count of COVID-19 deaths as of December 2021 is slightly more than 5.4 million, according to World Health Organization's report in May 2022. WHO also said that the real numbers are far higher than the official tally because of unregistered deaths in countries without adequate reporting.
cis-Butene-1,4-diol is a chemical compound used in the production of endosulfan. It reacts with hexachlorocyclopentadiene to form endosulfan diol. Endosulfan diol then reacts with thionyl chloride to form endosulfan.
1,2,4-Butanetriol trinitrate (BTTN), also called butanetriol trinitrate, is an important military propellant.It is a colorless to brown explosive liquid. [1]BTTN is used as a propellant in virtually all single-stage missiles used by the United States, including the Hellfire. [2]
Wi-Charge has stated that its technology complies with the IEC 60825-1 International Safety Standard (laser safety). According to this standard it is a Class 1 product. "Class 1: Lasers that are safe under reasonably foreseeable conditions of operation, including the use of optical instruments for intrabeam viewing."
1 (one, unit, unity) is a number, numeral, and glyph. 1 is the first and smallest positive integer of the infinite sequence of natural numbers.This fundamental property has led to its unique uses in other fields, ranging from science to sports, where it commonly denotes the first, leading, or top thing in a group. 1 is the unit of counting or measurement, a determiner for singular nouns, and a ...
1,2,4-Butanetriol is a clear or slightly yellow, odorless, hygroscopic, flammable, viscous liquid. It is an alcohol with three hydrophilic alcoholic hydroxyl groups . It is similar to glycerol and erythritol .
In the figure on the left, if the large square is taken to have area 1, then the largest black square has area 1 / 2 × 1 / 2 = 1 / 4 . Likewise, the second largest black square has area 1 / 16 , and the third largest black square has area 1 / 64 .